Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-20 | 145/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 27.42 (696.5) | 0.57 (14.5) 2.1% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 84.35 (2142.57) | 86.15 (2188.12) | 1.79 (45.55) 2.1% |
| Sidewall Height inches (mm) | 3.43 (87) | 3.71 (94.25) | 0.29 (7.25) 8.3% |
| Revolutions per mile (km) | 751.13 (466.73) | 735.49 (457.01) | -15.64 (-9.72) -2.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.43 mph (32.87 km/h) |
| 25 mph (40.23 km/h) | 25.53 mph (41.09 km/h) |
| 30 mph (48.28 km/h) | 30.64 mph (49.31 km/h) |
| 35 mph (56.33 km/h) | 35.74 mph (57.52 km/h) |
| 40 mph (64.37 km/h) | 40.85 mph (65.74 km/h) |
| 45 mph (72.42 km/h) | 45.96 mph (73.96 km/h) |
| 50 mph (80.47 km/h) | 51.06 mph (82.18 km/h) |
| 55 mph (88.51 km/h) | 56.17 mph (90.4 km/h) |
| 60 mph (96.56 km/h) | 61.28 mph (98.61 km/h) |
| 65 mph (104.61 km/h) | 66.38 mph (106.83 km/h) |
| 70 mph (112.65 km/h) | 71.49 mph (115.05 km/h) |
| 75 mph (120.7 km/h) | 76.59 mph (123.27 km/h) |
| 80 mph (128.75 km/h) | 81.7 mph (131.49 km/h) |
| 85 mph (136.79 km/h) | 86.81 mph (139.7 km/h) |
| 90 mph (144.84 km/h) | 91.91 mph (147.92 km/h) |
| 95 mph (152.89 km/h) | 97.02 mph (156.14 km/h) |
| 100 mph (160.93 km/h) | 102.13 mph (164.36 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1872 | 2174 | 2342 | 2445 | 2557 | 2636 | 2724 | 2827 | 2971 | 3114 | 3273 | 3401 | 3632 | 3887 | 4086 | 4213 | 4285 | 4548 | 4914 | 5711 |
Better Fuel Economy Factory Ratios Increased Power
